Bobber bird house



FIG. 1 is an upper left perspective view of a bobber bird house showing my new design;

FIG. 2 is a reduced front elevation view thereof;

FIG. 3 is a left side view of FIG. 2;

FIG. 4 is a right side view of FIG. 2;

FIG. 5 is a rear elevation view of FIG. 2;

FIG. 6 is a top view of FIG. 2; and,

FIG. 7 is a bottom view of FIG. 2.

The broken lines are for illustration only and form no part of the claimed design. 

The ornamental design for a bobber bird house, substantially as shown and described. 